My computer is screwed

okay i have a laundry list of problems going on.. My start button is missing all sorts of stuff.. My clock is wrong and says viris alert next to it...I have a button on my computer that allows me to get to my computer, but my c: and d: drive are missing.. my desktop screen flashes active desktop recovery. alt ctrl del doesn't work..says it's disabled by my admin (i am the admin and i didn't disable it)..if i right click and go to screen properties its some menu i haven't seen before with no options on it.. HELP...the only way i am sending you this is through my sisters computer...HIjackthis didn't work either...other malware programs go to fix the problems and can't because it says my admin won't let me delete anything out of my registry...

When the scan completes it will open a text window. Please attach that log back here together with a fresh HJT log.

Caution - do not touch your mouse/keyboard until the scan has completed. The scan will temporarily disable your desktop, and if interrupted may leave your desktop disabled. If this occurs, please reboot to restore the desktop. Combofix is a very powerful tool so please do NOT do anything without instruction

It happened to me last night. im getting weird virus alert popups and stuff, it says "virus alert" in the lower right hand corner, my start menus missing the "all programs" buttons, as well as everything on the right, such as my computer, control panel, etc. it also gives me the message " the computer administrator has disabled this action" or something like that. i tried first to use system restore, but apparently this virus has screwed that up as well. the system restore screen(which i can access only through safe mode) has only 1 entry...shortly after the virus commenced destroying my computer. i cant back up a month or anything. its really screwed up. im going to go home tonight and try what was posted here already, and keep my fingers crossed